AD20 is a SAP tcode coming under BC module and SAP_BASIS component. View some details about AD20 tcode in SAP.
- AD20 tcode used for : Search help maintenance (for IMG) in SAP
- Module : BC-DWB-DIC-AC (Activation Program, Conversion Program, DB Utility, MC, SPDD)
- Parent Module : BC (Basis Components)
- Package : SDD (Data Dictionary Maintenance 2.2 (and 3.0))
- ABAP Program : SAPLSD30

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Definitions
What is SAP ?SAP is the short form of Systems, Applications & Products in Data Processing. It is one of the largest business process related software. This software focused on business processes on ERP & CRM.
What is transaction code in SAP?Transaction code shortly known as tcode, is a shortcut code to access different functional areas in SAP. It avoid users from long menu path to reach a report. Instead of that users can type the corresponding transaction code and press enter, the corresponding SAP page will load. It’s a good practice to remember or note down the transaction codes that we need to use in our regular work.
AD20 related transaction codes
| Tcode | Note | 
|---|---|
| SH01 | Online help: F1 Help server | 
| AD20 | Search help maintenance (for IMG) | 
| REORRRFE | RE Search Request - Ad Hoc Search | 
| OIPL | Plant Maint./Service search help | 
| UGMW0020 | BDT: Search Help | 
| SH02 | Online help: Link tracing | 
| SH03 | Call extended help | 
| SR13 | Area-Dependent Help | 
| SHC_ADMIN | Manage Help Center Centrally | 
| SHC_TRANSLATION | Translate Help Center Texts | 
| EQ30 | Search Help for Parameter Recs (IMG) | 
| EQ31 | Search Help for Portions (IMG) | 
| EQ32 | Search Help for MR Units (IMG) | 
| EQ33 | Search Help for Contracts (IMG) | 
| EQ34 | Search Help for Conn. Objects (IMG) |